Cosmology for 3d20 Supers


Throughout the vast infinite multiverses known as the Omniverse, there are 10 dimensions, 1 Fundamental Force, and 1 Fundamental Particle.

The Fundamental Force and Fundamental Particle

The Fundamental Force exists in all multiverses and has infinite names. It is the force that holds all measurement, time, and possibilities together. The most common names are The Singularity, The Breath, Magic, The Universal Equation, or the OmniForce. In this game, the Fundamental Force is called Magic.

The Fundamental Particle is known only in some of the multiverses where sentient species actively interact with the Fundamental Force. Like the Fundamental Force, it has an infinite number of names. In this game, the Fundamental Particle is called an Em Particle.


The first four dimensions are familiar to many: length, width, depth, and time. All creatures move about in space-time within their respective universes. In other words, creatures travel from one place to another and experience time as a series of moments that make up the past and the present moment. The future represents moments that have yet to occur. For a game that never ventures other galaxies and stays largely centered on Earth, this will be all that any character needs to know.

For time travel within a universe, Chronotons or Time Particles are used to generate a field that measures relative time. Once time is mapped, time travel is possible.

Parallel Universes

Dimensions five and six deal with probability and all possible outcomes of events that happen in any given moment. Pithanotons or Probability Particles are used to generate a field that measures relative probabilities of parallel universes. In other words, It is a GPS of parallel universal travel that enables you to safely travel back and forth in parallel universes. Hexaton Fields are a combination of Pithanoton and Chronoton particles that allow travel to parallel worlds at any point in time in those worlds.

For universes that develop travel to parallel universes, Hexaton Fields allow travelers to arrive back in their homeworld at the exact moment after they left.

Strange Universes

Dimensions seven, eight, and nine deal with completely alien universes where the laws of physics operate differently. These universes include the realms of the Gods, anti-matter universes, and madness-inducing worlds.

Travel to these worlds requires the use of the Fundamental Force or the  Fundamental Particle. Magic is typical for universes that are not scientifically developed, Em Particles are used in worlds that have an advanced understanding of science and magic. It is not possible to understand Em Particles without an understanding of Magic.

More details about the methods of travel to strange universes are covered in the Magic section.


  • The Omniverse is comprised of all possible universes within all ten dimensions.
  • Magic is not unexplained science, it is a fundamental force that exists everywhere in the Omniverse.
  • With the right science, it is possible to travel in space, time, and parallel universes.
  • With magic, it is possible to travel in space, time, parallel universes, and strange universes.

This Old Sword

I began a podcast in April to talk about older versions of D&D, game ideas, and a lot of RPG things. I will soon post links to individual episodes with notes here.

Just like I have Paper Pills on this site for incomplete ideas, I have a feature called Paper Bullets for incomplete ideas there.

I am grateful for the very supportive OSR Anchorite group. Feel free to let me know what you think.

Episode 2 – The Black Hack

In Episode 2, I talk about one of my favorite systems, The Black Hack. The SRD for the first edition is located on Github. The SRD for the second edition is on the Open Gaming Network. The PDF for the 2nd edition is on DriveThruRPG.

I being with voicemails from fellow creators.

The first from Tim Shorts at Gothridge Manor. I respond by talking about a number of languages I speak incorrectly. I also mention 0e Monstrosities from Matt Finch and others.

The second is from "froth" of the Thought Eater podcast. This gives me a reason to talk about my favorite introduction to Tékumel, The Petal Hack by Brett Slocum.

Logan from The Swordbreaker podcast also calls in. I really appreciate all the encouragement from other podcasts. This, of course, provides yet another opportunity to talk about The Petal Hack. (Yes, I call it The Empire Hack three times. In my defense, I was sick.)

I also talk about The Teratic Tome by Rafael Chandler.

I mention two live streams on Twitter available here and here. Then talk about the joys of The Black Hack.

I don't get to the Outro because I feel guilty for the episode link.

My questions for you are:

What is your favorite book about Tékumel? Are there other non-European fantasy setttings you enjoy?

What's your favorite monster book in any edition?